%0 Journal Article
%A A. G. Pinus
%T Elementary Equivalence of Derived Structures of Free Semigroups, Unars, and Groups
%J Algebra i logika
%D 2004
%P 730-748
%V 43
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_2004_43_6_a4/
%G ru
%F AL_2004_43_6_a4